The Berghia are pretty amazing. I placed them on a rock with three small aiptasia and watched them for a few minutes. They seemed to happily wander around, and then mostly disappeared into the rock. I left the office for a few hours -- and when I came back the aiptasia on that rock were all gone! One of the Berghia had disappeared. But the other looked fat and happy where an aiptasia had once stood. I thought the others might just have closed up -- but nearly 12 hours later -- they are still gone. And, they never stay closed for more than a few minutes.
Date Added: 10-16-2011